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Scientific Method - Task Cards - pt 2

Last updated 7 months ago
14 questions

Sprouting Seeds


Janessa designed an experiment to answer the following question.

Which material is best for lima bean seeds to sprout?

Janessa’s Experiment Plan:

1. Put cotton balls in three baggies.

2. Put soil in three baggies.

3. Put gravel in three baggies.

4. Add 10 ml of water to each bag. Place a lima bean seed in each bag.

3. Hang the bags on the same window.

4. Every two days, measure and record plant growth.
1

What is the independent variable for this experiment?

1

What is the dependent variable for this experiment?

1

Why did Janessa decide to test soil, cotton balls, and gravel three times each?

1

Why did Janessa hang all nine baggies in the same window?

2

What information should be included in the data table?

Moon Craters


Melika made a model to help understand why craters on the moon are different sizes. She represented the moon’s surface with a pan of flour. Melika represented objects that hit the moon with marbles. She thinks that dropping marbles from a greater height will make the crater’s diameter larger.

Melika’s Plan:

1. Fill a pan with flour and smooth out the flour.

2. Drop the marble from 10 cm above the pan and measure the diameter of the crater formed. Smooth out the flour.

3. Drop the marble from 20 cm above the pan and measure the diameter of the crater formed. Smooth out the flour.

4. Drop the marble from 30 cm above the pan and measure the diameter of the crater formed.
1

What is a testable questions this experiment could answer?

2

What are 2 limitations of this model.

1

What is the independent variable?

1

What is the dependent variable?

1

What could Melika do to increase the reliability of her results?

Thermal Energy


Devon thinks wrapping a cotton towel around a jar of hot water will keep it warmer than without any wrapping at all. He is designing an experiment to determine whether construction paper, a paper towel, a cotton towel, or no wrapping at all will keep the water in the jar warmer.

Devon’s Plan:

1. Fill 4 jars with water that is 90°C.

2. Place a thermometer in each jar.

3. Wrap one jar with construction paper, one jar with a paper towel, one jar with a cotton towel, and leave one jar unwrapped. Make sure the wrapped jars have equal thickness.

4. Record the temperature of the water in each jar after 15 minutes has passed.

5. Repeat steps 1-4 two more times.
1

What is a testable question this experiment would answer?

1

Which jar is the control in the experiment?

1

What is the dependent variable?

2

Identify two constants from the experiment.